Simpson 0.390 x 7-7/8" Strong-Drive SDCF TIMBER-CF Screw (Black E-Coat) PPHD SHEATHING-TO-CFS Screw whereas smooth-shank alternatives may not

whereas smooth-shank alternatives may not meet the same performance thresholds

) in the joist

which simplifies positioning and alignment

and chloride-exposed applications

meaning you get strong mechanical keying without the complexity of traditional sleeve or wedge expansion anchors - ideal for fast-paced installation environments

Simpson 0.390 x 7-7/8" Strong-Drive SDCF TIMBER-CF Screw (Black E-Coat) PPHD SHEATHING-TO-CFS Screw whereas smooth-shank alternatives may notThe Simpson Strong Drive SDCF Timber CF Screw in 0. 390 x 7 7 8" is a redesigned structural fastener from Simpson engineered specifically for cross laminated timber (CLT), mass timber construction, and general interior applications. Built for heavy timber and engineered wood assemblies, this black e coat screw delivers flush, clean installation with the torque reducing performance that demanding structural work requires. Whether you're fastening